Setting tool



Sept. 27, 19328 M. cHRlsTENsl-:N

SETTING TOOL Filed April 18, 1952 M.v CHR 1STE N35 N INVENTOR.

BY @im Mza/8M ATTORNEY5 Patented Sept.l 27, 1932 UNITED STATES PATENT oFrlcE MAEINUS cHEIsTENsEN, or REFUGIO, TEXAS, AssIGNoEoF EIETY PEE. CENT 'ro E. E.

. CowAN, or REFUGIO COUNTY, TEXAS j l SETTING TOOL Application med April 1s, `1932. semaine. 605,894.

My invention relates to setting tools for use in setting Vin a well devices such as packers, strainers, liners, and the like.

It is an object of the invention to. provide a setting tool which will set a packer or similar device 'and which can easily be released therefrom when the setting of the packer has been accomplished. n

It'is'a further object to provide a setting tool which `is simple and economical in construction and which willfnot readily get out of order or fail in use.

`The invention has been devised for easy assembly, positiveness of operation, and simplicity of construction.

In the drawing a preferred embodiment ofthe invention has been illustrated. Fig. 1 is a central longitudinal section of the setting tool shown attached to a packer of the canvas type.

Fig. 2 is a side elevation ofthe packer and packer sleeve, certain parts being broken away for greater clearness.

Figs. 3 to 7, inclusive, are transverse sections taken on the planes 3 3, 4 4, 5 5,

6 6, and 7 7 of Fig. 1.

Figs. 8 and 9 are transverse sections on the planes 8 8 and 9 9 of Fig. 2.

The setting tool is illustrated as employed in setting a packer including a packer barrel 1, a canvas packer 2, and a packer sleeve 3.

VThe packer barrel is threaded at 4 for connection with a strainer or liner below the packer. A flange or ring 5 is fixed to the outer face of the barrel to support the windings ofcanvas forming the packer 2. At its upper end the canvas is attached by the windings of wire 6 to a nipple 7 forming the lower end of the packer sleeve 3. The packer barrel has a, downwardly inclined ratchet thread 8 along its outer surface toward the upper end thereof.

' The interior of the barrel at the upper end is formed with grooves or threads 9, which, as shown at 10 in Fig. 2, are interrupted by longitudinal keys or lands 10, at a plurality of points.

The setting tool includes an upper coupling member 11, threaded at 12 to engage with a setting stem which is commonly an ordinary vdrill stem. AtV its lower end the coupling is connected with a nipple 14, the lower end of which has a threaded connection with a bushing 17. The interior of the nipple 14 as its Vupper end has threaded connection with a guide nut `15, having aV central guide opening to receive the upper. end of the Inandrel 16.

The bushing .17 is a heavy fitting having a centralsquared opening 18 toreceive the' squared section 19 of the mandrel. This section of the mandrelv has a radialstop flange 20 at its upper end and asimilar flange 21 securedat its lower end.

Below the flange 21 the mandrel is cylindrical except at itslower end where "it is formed. with a flared expander headV 22 threaded to engage within a pluralityof clamping dogs 23 andxforce themY outward -intofixed engagement with the threads or grooves 9 in the upper end of thepacker barrel.` The interior of the mandrel forms a passage for fluid and is threaded at its lower end at 24 to engage with awash pipe on the like.

; The yclampingdogs 23 are shown as four:

in number of the proper size to engage on their outer surfaces within the grooved areas between thekeys 10 in the packer barrel. Each of the four dogs has an upwardly extending post 25 formedwithin an opening to receive a pivot pin. A holding ring 26, fitting loosely about the mandrel,has sets of downwardly extending lugs27 which have slotted openings therein to receive said pivot pins. The

slots allow lateral movement of the dogs relative to the ring when said dogs are being handled. Each dog is Vrecessed in its outer pe- -riphery to receive a circular spring 28, which y tends to move said dogs inwardly against the mandrel.

The bushing 17 has guide sleeve 29 secured at its lower end. "This sleeve fits slidably within the upper end of the packer sleeve 3 forming a telescoping connection to allow a limited movement of the packer sleeve relative to the bushing.

The lower end of the packer sleeve is detachably connected thereto for purposes of assembly. The detachablelower end 30 has an upwardly tapered recess 31 to house a spring ring 32, the inner face of which has ratchet teeth to engage the teeth on the outer surface of the packer barrel. Said ratchet ring is tapered upwardly in cross section to iit said recess.

When the packer is lowered into the well at the upper end of the strainer or liner, it is secured to the setting tool as shown in Fig. l. It will be noted that when the head 22 on the mandrel is screwed within the expander dogs, said dogs will be moved outwardly into gripping relation to the packer barrel.

The downward thrust of the setting stem will force the mandrel 16 downwardly through engagement of the bushing 17 upon the ange 21 and the packer will thus be moved to position.

When ythe packer is to be expanded, the setting stem will be rotated to screw the mandrel downwardly and release the head 22 from within the clamping dogs. Said dogs will not rotate because of the keys 10 between them. The mandrel will then drop downwardly until the upper flange 20 rides upon the bushing 17. This will allow the clamping dogs to collapse under the action of the spring 28 and the set-ting stem may then be lowered upon the packer sleeve 3 and move it down- -wardlyto expand the packer. As the packer sleeve moves downwardly upon the barrel the spring ratchet ring 32 will be moved downwardly also, but, through its engagement with the packer barrel, it will not allow the packer sleeve or packer to move back upwardly.

When the packer is set the setting tool will be free of the packer assembly and may easily be withdrawn from the well.

The tool has the advantage of easy operation and simplicity in structure and is not subiect to failure in use.

What I'claim as new is:

1. A setting tool adapted for engagement with a packer barrel, including a setting stem, a tubular mandrel slidable non-rotatably therein, an expander head on said mandrel and clamping jaws mounted on said head and adapt-ed to be expanded by said head to engage said packer barrel. K

2. A setting tool adapted for engagement with a packer barrel, including a setting stem, a tubular mandrel slidable nonrotatably therein, an expander head on said mandrel, and clamping jaws mounted on said head and adapted to be expanded by said head to engage said packer barrel, said head being releasable from said dogs to collapse said dogs bya downward screwing of said mandrel.

3. The combination of a packer barrel, a packer thereon, a packer sleeve slidable in a downward direction on said barrel, a setting stem, a mandrel thereon having a limited longitudinal sliding movement in said stem,

a downwardly flared head on said mandrel, having its outer surface threaded, and a plurality of clamping dogs threaded to engage said head and having their outer faces grooved to engage the upper end of said packer barrel, said dogs being releasable by a downward screwing of said mandrel.

1. The combination of a packer barrel, a packer thereon, a packer sleeve slidable in a downward direction on said barrel, a setting stem, a mandrel thereon having a limited longitudinal sliding movement in said stem, a downwardly flared head on said mandrel, having its outer surface threaded, and a plurality of clamping dogs threaded to engage said head and having their outer faces grooved to engage the upper end of said packer barrel, means acting to hold said dogs resiliently on said mandrel, said dogs being releasable by a downward screwing of said mandrel. f V Y 5. The combination of a packer barrel, a packer thereon, a packer sleeve slidable in a downward direction on said barrel, a bushing on said stem having a polygonal opening f to nonrotatably receive a mandrel, a setting stem, a mandrel thereon zhaving a limited longitudinal sliding movement in said stem, a downwardly flared head on said mandrel, having its outer surface threaded, anda plurality of clamping dogs threaded to engage said head and having'their outer faces' grooved to engage the upper endv of said packer barrel, said dogs being releasable by a downward screwing of said mandrel.

6. A tubular barrel, internal grooves therein at its upper end, a setting stem, a tubular mandrel slidable nonrotatablyin said stem, means to limit the movement of said man drel in said stem, a head on said mandrel,

and clamping means on said head engaging within the grooves` in said barrel, said head being releasable from said clamping means to disengage the same from said grooves, and

allow said setting stem to move downwardly on said barrel. Y

7. A tubular barrel, internal grooves therein at its upper end, a setting stem, a tubular mandrel slidable nonrotatably in said stem, means to limit the movement of said mandrel in said stem, al head on said mandrel and clamping means on said head engaging within the grooves in said barrel, including a plurality 0f dogs having a threaded engagement with said head and releasable therefrom by a downward screwing of said mandrel, means to hold said dogs resiliently inwardly.

In testimony whereof I hereuntoy aiiix my signature this 13 day of April, A. D. 1932. Y MARINUS CHRISTENSEN. 

